Dust collector



June 5, 1928. 1,672,001

A. A. SERVA ET AL DUST COLLECTOR Filed March 1, 1923 2 Sheeis-Sheet l l Q Q W M 9% x -I 2 I d iW h I.

Q I v y M (a Zlnoznloz a A.A. Gerda V 11 Frame June 5, 1928. 1,672,001

A. A. SERVA ET AL DUST COLLECTOR Filed March 1, 1923 2 Sheets-Sheet 2 A.A. SerzJa flfii'rz'mal Patented June 5, 1928.

UNITED STATES PATENT OFFICE.

ADAM AMOS SERVA, OF CANTON, AND DAVID E. FRIEND, OF NORTH INDUSTRY OHIO,

ASSIGNOBS TO THE UNITED ELECTRIC COMPANY, OF CANTON, OHiO, A CORPORA- TION OI OHIO.

DUBT- COLLECTOR.

This invention relates to improvements in dust collectors for vacuum cleaners and is more particularly adapted for use upon a portable cleaner.

The objects of the invention are to provide a dust collector including a rigid tubular member into which the dust-laden air is exhausted from the fan, a bag which maybe impervious being connected to the lower end of the tube, to receive the heavy dirt and dust which enters the tube, while a pervious bag is connected above the tube to receive the lighter dust and to permit the air to escape through the walls thereof.

The above and other objects may be attained by providing a T-elbow connected to the outlet of the fan chamber, the upper and lower bags being connected to the opposite ends of the T-elbow which is flared from the fan casing toward the bags to permit the air to expand.

A practical embodiment of the invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of a truck type of vacuum cleaner provided with the 1mproved dust collector, parts being broken awa to show the interior construction; and

Fig. 2, a to plan view of the same, the upper dust col ector bag being removed.

Similar numerals of reference indicate corresponding parts throughout the drawings.

The invention is illustrated as applied to the truck type of portable vacuum cleaner which includes the tank 1 supported upon the front wheels 2 and provided with the air inlet 3 communicating with the elbow 4: upon which is swivelled the nozzle 5 extended to on; side of the front portion of the tank, and provided with the casters 6 for engagement with the floor or other surface to be cleaned.

An intake pipe 7 is connected to the air inlet, the inner extremity thereof being directed upward toward the deflector 8 which is suspended from the upper portion of the tank as by the straps 9, a screen 10 covering the upper open end of the tank which communicates wlth the inlet 11 of the fan chamber or snail 12 in which a suction fan 13 is located and arranged to be rotated by the motor 14 which is mounted above the man This much of the construction may be varied, and in itself forms no part of the present invention. To the outlet neck '15 of the snail is attached a reduced extremity of the T-elbow 16, the enlarged, vertical portion 17 thereof being preferably located in the longltudlnal center of the device as shown in Fig 2.

he lower dust collector bag 18, which may be impervious, is suspended from the lower end of the portion 17 of the T-elbow, be1ng preferably connected thereto as by the bayonet joint 19. The upper dust collector bag 20 which is preferably nected to the u per end of t e portion 17 as by the bayonet oint 21, the upper end of the bag being supported as by the arm 22, which may be mounted upon the stationary portion of the truck.

The truck is arranged to be propelled over the floor by means of a handle comprising the U-shaped rod or pipe 23 connected at its forward end to the tank and extending rearwardly and upwardly as at 24, a swivelled caster 25 being connected to the cross plate 26 upon the handle, for the purpose of supporting'the rear portion of the device upon the floor.

The dust laden air which is expelled from the snail expands as it passes through the flared T-elbow, relieving the pressure gradually as the air passes from the exhaust of the snail to the vertical portion 17 of the T-elbow.

The air entering the portion 17, will e xpand upward and downward, the heavier dirt dropping into the lower bag 18, while only the lighter particles of the dust will pass upward into the upper bag 20, the air escaping through the walls thereof. Some of the lighter dust will drop down into the lower bag, while some will be retained upon the walls of the upper bag.

As the T-elbow is rigid, the air expelled from the exhaust of the snail into the portion 17, will be permitted to expand without bulging or distending the same, the air expanding up and down within the vertical portion 17 of the T.

As the -.T-elbow is flared away from the exhaust of the snail, the air may expand rapidly as it passes through the elbow, relieving pressure therein.

- When the machine is not in use, the walls of the upper bag may be shaken or tapped,

ervious, is conloo causing all of the dust adhering thereto to catin with the exhaust o ning and u gier fall into the lower b which can be quickly and ower dust collecting ags connecte to detached and em tie whenever necessary. o 'te ends of the T-elbow and directl 10 We claim P bi: ind the fan chamber. y 5 A vacuum cleaner including a fan chamher with an exhaust opening at one side, an ADAM AMOS SERVA. upright outwardly flared T-elbow communi- DAVID H. FRIEND; 

